/*
 * Copyright 2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.spockframework.runtime;

import org.spockframework.runtime.model.*;

import static java.lang.String.format;

public class SafeIterationNameProvider implements NameProvider<IterationInfo> {
  private final NameProvider<IterationInfo> delegate;

  public SafeIterationNameProvider(NameProvider<IterationInfo> delegate) {
    this.delegate = delegate;
  }

  @Override
  public String getName(IterationInfo iteration) {
    if (delegate == null) return getFallbackName(iteration);

    try {
      String name = delegate.getName(iteration);
      if (name != null) return name;
      return getFallbackName(iteration);
    } catch (Exception e) {
      return getFallbackName(iteration);
    }
  }

  private String getFallbackName(IterationInfo iteration) {
    return iteration.getFeature().isReportIterations()
      ? format("%s [#%d]", iteration.getFeature().getName(), iteration.getIterationIndex())
      : iteration.getFeature().getName();
  }
}
